Every NFL training camp has some good story to hop on, but the best story at Dolphins camp is someone that no one's talking about. Cornerback Brent Grimes is invisible while turning receivers invisible.

He's dominating one side of the secondary to the point teammates whisper quarterbacks won't throw his way in practice and receivers know what they're up against on his side.

"Whew," receiver Mike Wallace said. "He's ready."

This is notable since Grimes is the most important newcomer for this season after Wallace. It's also the hidden story playing out in front of everyone, because no one trusts it just yet.

That's nothing new for Grimes. It's the running theme of the man's life. Or, as he says, "Going under the radar is my story."

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You think there are players with Pro Bowl talent — a guy who jumps over cars for fun — sitting on the grocery shelf? The Dolphins know there aren't. They haven't had a cornerback total 11 interceptions over two years like Grimes in Atlanta since Patrick Surtain a decade ago.

That's part of why he's so important this year. He can turn a good defense into a great one by such turnovers. The other part is, as with Wallace, the Dolphins have no one behind him.